<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>居中</title>
		<style type="text/css">
			* {
				margin: 0;
				padding: 0;
			}
			div {
				width: 600px;
				height: 600px;
				background-color: #008000;
				margin: 0rem auto;
				/* margin: auto; */
				text-align: center;
			}
		</style>
	</head>
	<body>
		<div>稳住</div>
	</body>
</html>
